How to Use the Part Payment Calculator

A complete visual guide to getting the most out of our free Part Payment Calculator.

Part Payment Calculator Hero Image

Got an annual bonus or sold an asset? Injecting that capital into your debt is a brilliant move. The Part Payment Calculator visually demonstrates the massive impact of lump-sum injections on your active loans.

Prepayment vs. Part Payment

While often used interchangeably, part payment specifically refers to making bulk lump-sum injections at specific intervals during the loan lifecycle. Because interest is calculated on the daily outstanding balance, executing a part payment immediately stops interest from compounding on that specific chunk of money forever.

The Impact Logic

When you make a part payment P_part, the new outstanding principal becomes P_new = P_current - P_part. The bank then recalculates your future interest based entirely on P_new.

Strategic Timing

The golden rule of part payments is: Do it as early in the loan tenure as possible. In the first 5 years of a 20-year home loan, up to 80% of your EMI is purely interest. A part payment made in Year 2 will save exponentially more money than the exact same part payment made in Year 15.

Step-by-Step Instructions

  1. Outstanding Principal: Enter the exact balance remaining on your loan today.
  2. Part Payment Amount: Input the lump sum you are ready to pay to the bank.
  3. Interest Rate & Remaining Tenure: Enter your current bank details.
  4. Analyze the Results: The tool will instantly show you your new revised EMI (if you choose to lower your monthly burden) or your revised timeline (if you choose to close the loan faster).
Try the Part Payment Calculator Now